As far as I know, they are still operating them, and will continue to do so until the arrival of the EF-18G 'Growler' which is under development right now.
Last time, I read about them (July 2005), they were quite active in supporting the ground operations in Iraq. The jammers have been modified specifically to be used against 'Improvised Explosive Devices' or IEDs. They can prevent signals being sent to these devices (which work with relative simple trigger devices such as mobile phones) or detonate the device prematurely. IEDs are a big threat to convoys. Just sending a few Hummers with .50 cals won't do the job, reconnaissance assets and electronic warfare assets are deployed for these counter-IED operations. (EA-6Bs, EC-130H, UAVs, E-8C, even U-2s)